Unit 3.2.1 Arc Length

Front

An ____ is part of the circumference of a circle.

Back

arc

Front

In circle O, the radius is 4, and the measure of minor arc AB is 120 degrees. Find the length of minor arc AB. Round to the tenths place.

Back

8.4

Front

Find the arc length. Leave your answer in terms of π (Exact answer).

Back

7/2π

Front

What is the circumference of a circle with radius 12? (Exact answer)

Back

24π

Front

What is the formula for finding the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

If the radius of a circle is doubled, how does the circumference change?

Back

The circumference also doubles.

Front

What is the relationship between the angle in degrees and the arc length?

Back

Arc length = (θ/360) * C, where θ is the angle in degrees and C is the circumference.

Front

Calculate the circumference of a circle with a diameter of 10.

Back

C = 10π.

Front

What is the measure of a full circle in degrees?

Back

360 degrees.

Front

If the radius of a circle is 5, what is the length of a 90-degree arc?

Back

(90/360) * 10π = 2.5π.